#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
@Author  :  Thistledown
@Contact :  120768091@qq.com
@Software:  PyCharm
@File    :  ex21.py
@Time    :  2018/8/20 15:03
"""
'函数的返回值'

def add(a, b):
    print('ADDING %d + %d' % (a, b))
    return a + b

def subtract(a, b):
    print('SUBTRACTING %d - %d' % (a, b))
    return a - b

def multiply(a, b):
    print('MULTIPLYING %d * %d' % (a, b))
    return a * b

def divide(a, b):
    print('DIVIDING %d / %d' % (a, b))
    return a / b

print("Let's do some math with just functions!")

age = add(30, 5)
height = subtract(78, 4)
weight = multiply(90, 2)
iq = divide(100, 2)

print('Age: %d, Height: %d, Weight: %d, IQ: %d' % (age, height, weight, iq))

# A puzzle for the extra credit, type it in anyway
print('Here is a puzzle.')
what = add(age, subtract(height, multiply(weight, divide(iq, 2))))
print('That becomes: ', what, 'Can you do it by hand?')

